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  <title>Retrieves the number of fields (columns) on a statement</title>
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  <div id="layout-content"><div id="function.sqlsrv-num-fields" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">sqlsrv_num_fields</h1>
  <p class="verinfo">(No version information available, might only be in Git)</p><p class="refpurpose"><span class="refname">sqlsrv_num_fields</span> &mdash; <span class="dc-title">Retrieves the number of fields (columns) on a statement</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.sqlsrv-num-fields-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>sqlsrv_num_fields</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stmt</code></span>
   ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>

  <p class="para rdfs-comment">
   Retrieves the number of fields (columns) on a statement.
  </p>
 </div>

 
 <div class="refsect1 parameters" id="refsect1-function.sqlsrv-num-fields-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">stmt</code></dt>

     <dd>

      <p class="para">
       The statment for which the number of fields is returned. 
       <span class="function"><strong>sqlsrv_num_fields()</strong></span> can be called on a statement before 
       or after statement execution.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 
 <div class="refsect1 returnvalues" id="refsect1-function.sqlsrv-num-fields-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the number of fields on success. Returns <strong><code>FALSE</code></strong> otherwise.
  </p>
 </div>

 
 <div class="refsect1 examples" id="refsect1-function.sqlsrv-num-fields-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2585">
    <p><strong>Example #1 <span class="function"><strong>sqlsrv_num_fields()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$serverName&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"serverName\sqlexpress"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$connectionInfo&nbsp;</span><span style="color: #007700">=&nbsp;array(&nbsp;</span><span style="color: #DD0000">"Database"</span><span style="color: #007700">=&gt;</span><span style="color: #DD0000">"dbName"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"UID"</span><span style="color: #007700">=&gt;</span><span style="color: #DD0000">"username"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"PWD"</span><span style="color: #007700">=&gt;</span><span style="color: #DD0000">"password"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$conn&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">sqlsrv_connect</span><span style="color: #007700">(&nbsp;</span><span style="color: #0000BB">$serverName</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$connectionInfo</span><span style="color: #007700">);<br />if(&nbsp;</span><span style="color: #0000BB">$conn&nbsp;</span><span style="color: #007700">===&nbsp;</span><span style="color: #0000BB">false&nbsp;</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;die(&nbsp;</span><span style="color: #0000BB">print_r</span><span style="color: #007700">(&nbsp;</span><span style="color: #0000BB">sqlsrv_errors</span><span style="color: #007700">(),&nbsp;</span><span style="color: #0000BB">true</span><span style="color: #007700">));<br />}<br /><br /></span><span style="color: #0000BB">$sql&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"SELECT&nbsp;*&nbsp;FROM&nbsp;Table_1"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$stmt&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">sqlsrv_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$sql</span><span style="color: #007700">);<br />if(&nbsp;</span><span style="color: #0000BB">$stmt&nbsp;</span><span style="color: #007700">===&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;die(&nbsp;</span><span style="color: #0000BB">print_r</span><span style="color: #007700">(&nbsp;</span><span style="color: #0000BB">sqlsrv_errors</span><span style="color: #007700">(),&nbsp;</span><span style="color: #0000BB">true</span><span style="color: #007700">));<br />}<br /><br /></span><span style="color: #0000BB">$numFields&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">sqlsrv_num_fields</span><span style="color: #007700">(&nbsp;</span><span style="color: #0000BB">$stmt&nbsp;</span><span style="color: #007700">);<br /><br />while(&nbsp;</span><span style="color: #0000BB">sqlsrv_fetch</span><span style="color: #007700">(&nbsp;</span><span style="color: #0000BB">$stmt&nbsp;</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">//&nbsp;Iterate&nbsp;through&nbsp;the&nbsp;fields&nbsp;of&nbsp;each&nbsp;row.<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #007700">for(</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">&lt;&nbsp;</span><span style="color: #0000BB">$numFields</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i</span><span style="color: #007700">++)&nbsp;{&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">sqlsrv_get_field</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$i</span><span style="color: #007700">).</span><span style="color: #DD0000">"&nbsp;"</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"&lt;br&nbsp;/&gt;"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>

 
 <div class="refsect1 seealso" id="refsect1-function.sqlsrv-num-fields-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="sqlsrv_field_metadata.html" class="function" rel="rdfs-seeAlso">sqlsrv_field_metadata()</a> - Retrieves metadata for the fields of a statement prepared by 
  sqlsrv_prepare or sqlsrv_query</span></li>
    <li class="member"><span class="function"><a href="sqlsrv_fetch.html" class="function" rel="rdfs-seeAlso">sqlsrv_fetch()</a> - Makes the next row in a result set available for reading</span></li>
    <li class="member"><span class="function"><a href="sqlsrv_get_field.html" class="function" rel="rdfs-seeAlso">sqlsrv_get_field()</a> - Gets field data from the currently selected row</span></li>
   </ul>
  </p>
 </div>

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